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How many of the following ethers CANNOT ...

How many of the following ethers CANNOT be prepared by Williamson's synthesis?
`CH_(3)OCH_(2)CH_(3),C_(6)H_(5)OCH_(3), (C_(6)H_(5))_2O, (CH_(3))_(3)COCH_(3),(C_(2)H_(5))_2O, (CH_(3))_(3)C-O- C(CH_3)_(3)`

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Total number of the following ethers that can be prepared by Williamson synthesis is : C_(6)H_(5)CH_(2)OC_(6)H_(5),C_(6)H_(5)OC_(6)H_(5),(CH_(3))_(3)COCH_(2)CH_(3),(CH_(3))_(3)COC(CH_(3))_(3),C_(6)H_(5)OCH_(2)CH_(3),CH_(3)OCH_(2)CH_(3)

How many of the following ethers can be synthesised by typical Williamson's reaction ? R_(2)CH-O-CHR_(2),R_(3)C-O-CR_(3),R_(3)C-O-CHR_(2),C_(6)H_(5)-O-C_(6)H_(5),RCH=CH-O-CH=CHR',R_(3)C CH_(2)-O-CH_(2)CR_(3)

How many of the following alkyl halides would react by S_(N^(1)) mechanism? CH_(3)Br,CH_(3)CH_(2)Br,CH_(3)CH_(2)CH_(2)I,(CH_(3))_(3)CBr,BrCH_(3)CH=CH_(2),C_(6)H_(5)CH_(2)Br,(CH_(3))_(3)C CH_(2)Br,C_(6)H_(5)CHBrCH_(3),CH_(3)CH=CHCH_(2)Cl . .

Which of the following undergoes haloform reaction? (i) CH_(3)CH_(2)COCH_(2)CI (ii) C_(6)H_(5)COCH_(3) (iii) C_(6)H_(5)COCHI_(2) (iv) CH_(3)CH_(2)COCCI_(3)

How many of the following reagents can be used for the preparation of 3^(@) alcool with Grignard reagents ? HCOOC_(2)H_(5),CH_(3)COOC_(2)H_(5),CH_(3)CHO,CH_(3)COCH_(3),C_(2)H_(5)COC_(6)H_(5)

Arrange the following compounds in the increasing order of their boiling points: CH_(3)CH_(2)CH_(2)CHO, CH_(3)CH_(2)CH_(2)CH_(2)OH, H_(5)C_(2)-O-C_(2)H_(5),CH_(3)CH_(2)CH_(2)CH_(3)

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